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    1: # The LearningOnline Network
    2: # Bulletin Board Handler
    3: #
    4: # $Id: lonbulletin.pm,v 1.44 2007/07/03 00:12:30 www Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: 
   29: package Apache::lonbulletin;
   30: 
   31: use strict;
   32: use Apache::Constants qw(:common);
   33: use Apache::loncommon;
   34: use Apache::lonnet;
   35: use Apache::lontexconvert;
   36: use Apache::lonfeedback;
   37: use Apache::lonlocal;
   38: use Apache::lonhtmlcommon;
   39: use HTML::Entities();
   40: use LONCAPA;
   41: 
   42: sub handler {
   43:     my $r = shift;
   44:     &Apache::loncommon::content_type($r,'text/html');
   45:     $r->send_http_header;
   46:     return OK if $r->header_only;
   47:     my $target=$env{'form.grade_target'};
   48: 
   49: # ------------------------------------------------------------ Print the screen
   50:     if ($target eq 'tex') {
   51: 	$r->print(&Apache::lonprintout::print_latex_header($env{'form.latex_type'}));
   52:     }
   53:     my (undef,undef,undef,undef,$marker)=split(/\//,$r->uri);
   54: # Is this even in a course?
   55:     if (!$env{'request.course.id'}) {
   56: 	&Apache::loncommon::simple_error_page($r,'Not in a course',
   57: 				                'Not in a course');
   58:         return OK;
   59:     }
   60: 
   61:     $marker=~s/\D//g;
   62: 
   63:     if (!$marker) {
   64: 	&Apache::loncommon::simple_error_page($r,'Invalid Call',
   65: 					      'Invalid Call');
   66:         return OK;
   67:     }
   68: 
   69:     my $dom = $env{'course.'.$env{'request.course.id'}.'.domain'};
   70:     my $crs = $env{'course.'.$env{'request.course.id'}.'.num'};
   71:     my ($group,$grp_desc);
   72: 
   73: # --------------------------------------------------------- The syllabus fields
   74:     my %syllabusfields=&Apache::lonlocal::texthash(
   75:        'aaa_title'         => 'Topic',
   76:        'bbb_content'       => 'Task',
   77:        'ccc_webreferences' => 'Web References');
   78: 
   79: # ------------------------------------------------------------ Get Query String
   80:     &Apache::loncommon::get_unprocessed_cgi
   81:                 ($ENV{'QUERY_STRING'},['forcestudent','forceedit','register',
   82:                                        'origpage','group','ref']);
   83: # ----------------------------------------------------- Force menu registration
   84:     my %addentries;
   85:     if ($env{'form.origpage'}) {
   86: 	$addentries{'onload'} = "document.location='#newpost';";
   87:     }
   88: # --------------------------------------------------------------- Force Student
   89:     my $forcestudent='';
   90:     if ($env{'form.forcestudent'}) { $forcestudent='student'; }
   91: 
   92:     my $forceedit='';
   93:     if ($env{'form.forceedit'}) { $forceedit='edit'; }
   94:     my $refarg = '';
   95:     if (exists($env{'form.ref'})) { $refarg = 'ref='.$env{'form.ref'}; }
   96: 
   97:     my %syllabus=&Apache::lonnet::dump('bulletinpage_'.$marker,$dom,$crs);
   98: 
   99:     my $boardurl = $r->uri;
  100:     if ($boardurl =~ m|/adm/\Q$dom\E/\Q$crs\E/\d+/bulletinboard|) {
  101:         if (!exists($syllabus{'group'})) {
  102:             &Apache::loncommon::simple_error_page($r,'Group information missing',
  103:                                                  'Group information missing');
  104: 
  105:             return OK;
  106:         } else {
  107:             $group = $syllabus{'group'};
  108:             if ($group eq '') {
  109:                 &Apache::loncommon::simple_error_page($r,'Invalid group',
  110:                                                      'Invalid group');
  111:                 return OK;
  112:             }
  113:             my %curr_groups = &Apache::longroup::coursegroups($dom,$crs,$group);
  114:             if (!defined($curr_groups{$group})) {
  115:                 &Apache::loncommon::simple_error_page($r,'Invalid group',
  116:                                                      'Invalid group');
  117:                 return OK;
  118:             } else {
  119:                 my %content = &Apache::longroup::get_group_settings(
  120:                                                           $curr_groups{$group});
  121:                 $grp_desc = &unescape($content{'description'});
  122:             }
  123:         }
  124:     }
  125:        
  126: # --------------------------------------- There is such a user, get environment
  127:     if ($target ne 'tex') {  
  128: 	my $start_page =
  129: 	    &Apache::loncommon::start_page("Bulletin Board/Discussion",undef,
  130: 					   {'function'       => $forcestudent,
  131: 					    'add_entries'    => \%addentries,
  132: 					    'domain'         => $dom,
  133: 					    'force_register' =>
  134: 						$env{'form.register'}});
  135: 	$r->print($start_page);
  136:         if ($group ne '' && $env{'form.group'} eq $group) {
  137:             my $gpterm =  &Apache::loncommon::group_term();
  138:             my $ucgpterm = $gpterm;
  139:             $ucgpterm =~ s/^(\w)/uc($1)/e;
  140:             my ($groupboards,$boards) =
  141:                 &Apache::longroup::get_group_bbinfo($dom,$crs,$group,$boardurl);
  142:             my $boardtitle;
  143:             if ((ref($groupboards) eq 'ARRAY') && (@{$groupboards} > 0)) {
  144:                 $boardtitle = $$boards{$$groupboards[0]}{'title'};
  145:             }
  146:             $boardurl .= '?register=1&group='.$group;
  147:             $r->print(&groupboard_breadcrumbs($dom,$crs,$group,$refarg,$gpterm,
  148:                                 $ucgpterm,$grp_desc,$boardurl,$boardtitle));
  149:         }
  150:     }
  151:     my ($allowed);
  152:     if ($group ne '') {
  153:         $allowed=&Apache::lonnet::allowed('mdg',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''));
  154:         if (!$allowed) {
  155:             $allowed = &Apache::lonnet::allowed('cgb',$env{'request.course.id'}.
  156:                                                 '/'.$group);
  157:         }
  158:         if (!$allowed) {
  159:             if ((!&Apache::lonnet::allowed('vcg',$env{'request.course.id'}.($env{'request.course.sec'}?'/'.$env{'request.course.sec'}:''))) &&
  160:                (!&Apache::lonnet::allowed('vgb',$env{'request.course.id'}.
  161:                                                 '/'.$group))) { 
  162:                  &print_end_page($r,$target);
  163:                  return OK;   
  164:             }
  165:         }
  166:     } else {
  167:         $allowed=&Apache::lonnet::allowed('mdc',$env{'request.course.id'});
  168:     }
  169: 
  170:     my $privileged=$allowed;
  171:     if (($syllabus{'uploaded.lastmodified'}) && (!$forceedit)) {
  172:  	$forcestudent='student';
  173:     }
  174:     if ($target ne 'tex') { $r->print('<table><tr><td>'); }
  175:       if ($forcestudent or $target eq 'tex') { $allowed=0; }
  176:  
  177:       if ($allowed) {
  178:           my $query_str = 'forcestudent=1';
  179:           if (($group ne '') && ($env{'form.group'} eq $group)) {
  180:               $query_str.='&amp;group='.$group.'&amp;'.$refarg;
  181:           }
  182:           $r->print(
  183: 	  '<p>'.
  184: &Apache::loncommon::help_open_topic('Uploaded_Templates_TextBoxes','Help with filling in text boxes').'<br /><a href="'.$r->uri.'?'.$query_str.'"><font size="+1">'.&mt('Show Student View').'</font></a>'.
  185:  &Apache::loncommon::help_open_topic('Uploaded_Templates_PublicView').'</p>');
  186:       }  elsif ($privileged and $target ne 'tex') {
  187:           my $query_str = 'forceedit=edit';
  188:           if (($group ne '') && ($env{'form.group'} eq $group)) {
  189:               $query_str.='&amp;group='.$group.'&amp;'.$refarg;
  190:           }
  191: 	  $r->print('<a href="'.$r->uri.'?'.$query_str.'"><font size="+1">'
  192: 		    .&mt('Edit').'</font></a>');
  193:       } 
  194: 
  195:       if (($env{'form.uploaddoc.filename'}) &&
  196:           ($env{'form.storeupl'}) && ($allowed)) {
  197:  	  if ($env{'form.uploaddoc.filename'}=~/\.(gif|jpg|png|jpeg)$/i) {
  198: 	      if ($syllabus{'uploaded.photourl'}) {
  199: 		  &Apache::lonnet::removeuploadedurl($syllabus{'uploaded.photourl'});
  200: 	      }
  201:               if ($group ne '') {
  202: 	          $syllabus{'uploaded.photourl'}=
  203: 		      &Apache::lonnet::userfileupload('uploaddoc',1,
  204:                                                       'bulletin/'.$group.'/'.$marker);
  205:               } else {
  206:                   $syllabus{'uploaded.photourl'}=
  207:                       &Apache::lonnet::userfileupload('uploaddoc',1,
  208:                                                       'bulletin/'.$marker);
  209:               }
  210:  	  }
  211:           $syllabus{'uploaded.lastmodified'}=time;
  212:           &Apache::lonnet::put('bulletinpage_'.$marker,\%syllabus,$dom,$crs);
  213:        }
  214:        if (($allowed) && ($env{'form.storesyl'})) {
  215: 	   foreach my $syl_field (keys(%syllabusfields)) {
  216:                my $field=$env{'form.'.$syl_field};
  217:                $field=~s/\s+$//s;
  218:                $field=&Apache::lonfeedback::clear_out_html($field,1);
  219: 	       $syllabus{$syl_field}=$field;
  220:            }
  221:            $syllabus{'uploaded.lastmodified'}=time;
  222:            &Apache::lonnet::put('bulletinpage_'.$marker,\%syllabus,$dom,$crs);
  223:        }
  224: 
  225: # ---------------------------------------------------------------- Get syllabus
  226:     if (($syllabus{'uploaded.lastmodified'}) || ($allowed)) {
  227:        if ($syllabus{'uploaded.photourl'}) {
  228: 	   &Apache::lonnet::allowuploaded('/adm/syllabus',
  229: 					  $syllabus{'uploaded.photourl'});
  230: 	   $r->print('<img src="'.$syllabus{'uploaded.photourl'}.
  231: 	       '" align="right" />');
  232:        }
  233:        if ($allowed) {
  234:            $r->print(
  235: 	 '<form method="post" enctype="multipart/form-data">'.
  236:  	 '<input type="hidden" name="forceedit" value="edit" />'.
  237:          '<h3>'.&mt('Upload a Photo').'</h3>'.
  238:          '<input type="file" name="uploaddoc" size="50">'.
  239:          '<input type="submit" name="storeupl" value="'.&mt('Upload').'">'.
  240: 	 '</form><form method="post">');
  241:        }
  242:        foreach my $field (sort(keys(%syllabusfields))) {
  243:           if (($syllabus{$field}) || ($allowed)) {
  244:               my $message=$syllabus{$field};
  245: 	      &Apache::lonfeedback::newline_to_br(\$message);
  246: 	      $message
  247:         =~s/(https*\:\/\/[^\s]+)/\<a href=\"$1\"\>\<tt\>$1\<\/tt\>\<\/a\>/g;
  248: 	      if ($allowed) {
  249: 		  $message=&Apache::lonspeller::markeduptext($message);
  250: 	      }
  251: 	      $message=&Apache::lontexconvert::msgtexconverted($message);
  252: 	      unless ($field eq 'aaa_title') {
  253: 		if (($field ne 'bbb_content') || ($allowed)) {
  254: 		    if ($target ne 'tex') {
  255: 			$r->print('<h3>'.$syllabusfields{$field}.'</h3>');
  256: 		    } else {
  257: 			$r->print('\\\\\textbf{'.$syllabusfields{$field}.'}\\\\');
  258: 		    }
  259: 		}
  260: 		if ($target ne 'tex') {
  261: 		    $r->print('<blockquote>'.
  262:                               $message.'</blockquote>');
  263: 		} else {
  264: 		    $r->print(' '.&Apache::lonxml::xmlparse($r,'tex',$message).' ');
  265: 		}
  266:                  if ($allowed) {
  267:                 $r->print('<br /><textarea cols="80" rows="10" name="'.$field.'">'.
  268: 			  &HTML::Entities::encode($syllabus{$field},'&"<>').
  269:            '</textarea><input type="submit" name="storesyl" value="'.&mt('Save').'" />');
  270: 	        }
  271: 	    } else {
  272:                 if ($target ne 'tex') {
  273: 		    $r->print('<h1>'.$message.'</h1>');
  274: 		} else {
  275: 		    $r->print('\\\\\textbf{'.&Apache::lonxml::xmlparse($r,'tex',$message).'}\\\\');
  276: 		}
  277:                 if ($allowed) {
  278:                  $r->print(
  279:                 '<br />'.&mt('Topic').'<br /><textarea cols="80" rows="2" name="'.$field.'">'.
  280: 			  &HTML::Entities::encode($syllabus{$field},'&"<>').
  281:            '</textarea><input type="submit" name="storesyl" value="'.&mt('Save').'" />');
  282:                 }
  283:             }
  284: 	  }
  285:        }
  286:        if ($allowed) {
  287: 	   $r->print('</form>');
  288:        }
  289:        if ($target ne 'tex') {$r->print('</p>');} else {$r->print('\\\\');}
  290:     } else {
  291:        $r->print('<p>'.&mt('No page information provided.').'</p>');
  292:     }
  293:     if ($target ne 'tex') { $r->print('</td></tr></table>'); }
  294:     if ($target ne 'tex') {
  295: 	$r->print(&Apache::lonfeedback::list_discussion
  296: 	           ('board','OPEN','bulletin___'.$marker.'___'.
  297: 	            $r->uri,undef,$group));
  298:     } else {
  299: 	$r->print('\\\\'.&Apache::lonxml::xmlparse($r,'tex',&Apache::lonfeedback::list_discussion
  300: 	           ('board','OPEN','bulletin___'.$marker.'___'.
  301: 	            $r->uri,undef,$group)));
  302:     }
  303:     &print_end_page($r,$target);
  304:     return OK;
  305: }
  306: 
  307: sub print_end_page {
  308:     my ($r,$target) = @_;
  309:     if ($target ne 'tex') {
  310:         $r->print(&Apache::loncommon::end_page());
  311:     } else {
  312:         $r->print('\end{document}');
  313:     }
  314: }
  315: 
  316: sub groupboard_breadcrumbs {
  317:     my ($cdom,$cnum,$group,$refarg,$gpterm,$ucgpterm,$description,$boardurl,
  318:         $boardtitle)= @_;
  319:     &Apache::lonhtmlcommon::clear_breadcrumbs();
  320:     if ($refarg ne '') {
  321:         &Apache::lonhtmlcommon::add_breadcrumb
  322:             ({href=>"/adm/coursegroups",
  323:               text=>"Groups",
  324:               title=>"View course groups"});
  325:     }
  326:     &Apache::lonhtmlcommon::add_breadcrumb
  327:         ({href=>"/adm/$cdom/$cnum/$group/smppg?$refarg",
  328:           text=>"$ucgpterm: $description",
  329:           title=>"Go to group's home page"},
  330:          {href=>"/adm/groupboards?group=$group&amp;$refarg",
  331:           text=>"Discussion Boards",
  332:           title=>"Display group discussion boards"},
  333:          {href=>"$boardurl",
  334:           text=>"$boardtitle",
  335:           title=>"$boardtitle"},
  336:         );
  337:     my $output .= &Apache::lonhtmlcommon::breadcrumbs(&mt('[_1] discussion boards - [_2]',$gpterm,$description));
  338:     return $output;
  339: }
  340: 
  341: 1;
  342: __END__